Barcelona Street with NEX-7 Part II

hi I just saw this wonderful set! but I was just wondering what your opinions on a couple of things.

1. the 16mm has gotten some very bad reviews, so I was wondering what you thought about it

with and without the VCL- ECU1

2. Also can the VCL-ECU1 fit on the Sigma 19mm in any sort of way?

Hope to hear from you, these are very beautiful shots, love your eye for composition.

thanks!

- bgshutter